An enormous catalog of transitional forms have been found since the time 60 years ago when Gould wrote his book. Since Gould’s long, long ago retirement from the field, paleontologists have discovered:
- the long series from Pakicetus to blue whales
- intermediate forms such as Tiktaalik in the transition from fish to amphibians.
- a long series of transitional forms from dinosaurs to birds
- a long series of transitional forms from early hominids to humans.